Customer make changes while order still in Pick status

Customers occasionally make mistakes with their order, most of which are realised immediately by the customer upon receiving their order confirmation email. Mistakes can be with recipient name, address, card/wrapping selection, card message, product, number of products etc. Currently the only way for a customer to let us know that there is an error is by calling or live chat (business hours only), emailing or filling in the contact form (3 business hour response time). Our dispatch timeframe is rapid and therefore the item is often sent before the error has been corrected. It would be great for the customer to be able to access the order and make changes to it while it is still in Pick status. The customer can already access their orders through their profile login, and each order has a status, so it could be made clear that changes can only be made to those in Pick, for example. This would result in fewer emails and/or calls from customers, and fewer RTS requests or orders coming back to us as a result of an incorrect address. Overall the result would be happier customers who are able to solve their own issues, saving them time and frustration, and saving us time.